{
  "manageEntity": {
    "action": "Create",
    "entityId": "404467225",
    "entityType": "Comment",
    "metadata": "{\"cid\":\"\",\"data\":{\"entity_type\":\"Track\",\"user_id\":1,\"entity_id\":212896575,\"body\":\"tuff\",\"comment_id\":404467225,\"track_timestamp_s\":80,\"mentions\":[]}}",
    "nonce": "0x280e05a370e2e1547059f7e98b317ba508ac4316f35f0131846d9a0b7c8b0d53",
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    "signer": "0x7D273271690538cF855E5b3002A0dD8c154bB060",
    "userId": "1"
  }
}